Crushing-mill.



J. F. ONBIL.

GBUSHING MILL.

APPLICATION FILED JUNE 13, ms.

1,09 1,953. Patented Mar. 31, 1914,

inventor. .o'mu

JF W 25 1 WW UNITED STATES PATENT OFFICE.

JOHN ONEIL, OF ST. LOUIS, MISSOURI.

CRUSHING-MILL.

To all whom it may concern Be it known that 1, JOHN F. ONEIL, a citizen of the United States of America, residing at the city of St. Louis and State of Missouri, have iny'ented certain new. and useful Improvements in Crushing-WIills, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification,

My invention relates to crushing mills, and more particularly to mills for crushing sugar cane.

Sugar cane crushing mills, as commonly made at the presnt time, include two lower rolls, an upper roll cooperable with both of the lower rolls, and hydraulic caps operable against bearings for the upper rolls, by which the latter are yieldingly held, so that they may move away from the lower rolls when unusuzl pressure is exerted against the upper roll. The most common practice in such mills is to secure the hydraulic caps to the mill housings by bolts requiring bolt holes in the housings, which necessarily weaken the latter. Furthermore, where bolts are used to hold the hydraulic caps, it

is diflicult to obtain the most desirable ar-.

rangement of the bolts, in order that the strain imposed upon the hydraulic caps and the housings may be taken care of to the best advantage. Moreover, the bolts by which the hydraulic caps are held are usually so applied to the mills as to necessitate a considerable amount of labor and the handling of heavy and cumbersome parts of the mills when the hydraulic caps and the upper rolls are removed and replaced from time to time, owing to necessary repairs, or substitution of parts which have become so worn as to become unfit for further service.

My invention has for its object to so produce-a crushing mill as to absolutely dispense with the use of bolts for holding the hydraulic caps of crushing mills in themill housings, and to so mount and interlock such caps in the housings that they may be re moved and replaced quickly, easily and with a minimum of labor.

Figure I is a side elevation of the, rolls of a crushing mill, the upper portion of one of the housings of the mill and the hydraulic cap, the latter being partly in section. Fig. II is in part a top or plan view and in part a horizontal section of my hydraulic cap and portions of the housing adjacent to said Specification of Letters Patent.

' Application filed June 1a, 1913.

Patented Mar. 31, '1914.

Serial No. 773,472.

cap. Fig. III is a perspective view of my hydraulic cap.

In the drawings: A and B designate the two lower rolls of my crushing mill, having journals a and b, and C is the upper roll having journals 0.

1 designates the jaw of one of the housings of my crushing mill, in which the journals of the upper roll are arranged, this housing being suitably formed beneath the jaw to receive the journals of the lower rolls and The journals of the upper rolls C normally-rest upon lower bearings 2 at the bottoms of pockets 3 in the jaws 1. The walls of the pocket 3 include guides 5, that serve to direct the movement of upper bearings 2, which press against the journals 0 of the upper roll 0.

(3 designates one of the hydraulic caps of my crushing mill, these caps being provided with chambers 7 into which fluid under pressure may be introduced to act against pistons 8 and force plungers 9 downwardly against the upper bearings 2' resting on the journals of the upper roll C. This arrange ment of parts for yieldingly holding the upper roll of the crushing mill presented toward the lower rolls of the mill is old, and no invention is herein claimed therefor.

To provide for the application of my hydraulic cap to the housing of my crushing mill without the use of bolts,- I provide the cap with side lugs 10, which enter grooves 4 formed in the sides of the jaw 1 of the mill housing, the said grooves being extended inwardly from .the walls of the pockets 3 above the guides 5, and being open at their ends, in order that the lugs on the hydraulic cap may be readily and quickly slipped thereinto, or withdrawn therefrom,

mounting or deinounting the hydraulic cap.

The top walls of the grooves 4- are preferably inclined upwardly from the walls of the pocket 3 to the back walls of the grooves, and the upper edges of the lugs 10 are preferably inclined correspondingly, with the object in view of causing the strain imposed upon the lugs of the hydraulic cap to be directed into the jaws 1 of the housing toward the upper and outer corners of the jaws, or in the lines of greatest resistance to the strain exerted by 'such' lugs. against the aws.

My hydraulic caps are readily slipped into place in the jaws of the mill housing,

and interlocked therewith in the manner explained, and are held against movement by any suitable means, such, for example, as dowels 11, which are insertible into recesses 6 in the hydraulic caps and corresponding recesses registering therewith formed in the upper ends of the jaws 1.

It will be observed that removal of my hydraulic caps by slipping them out of the jaw of the mill housing permits ready access to the upper bearings 53 and that, after liftingthese bearings out of the pockets 3 in the jaws, the upper roll C may be readily taken from the housingfor repairs and reintroduction, or replacement by a new roll, if desired. All of these acts are rendered possible following the simple act of slipping the hydraulic caps out of the jaws of my mill housing and are, therefore, accom- 'plished at a minimum expenditure of time with grooves, and the walls of said grooves opposed to the axis of the roll journal being inclined upwardly from the Walls of the pocket to the back walls of the grooves, and a hydraulic cap having lugs provided with inclined faces corresponding to the inclined walls of said grooves, the inclined top faces of said lugs being seated against the inclined walls of the grooves.

2. A crushing mill, comprising a housing including jaws, a roll having a journal mounted between said jaws, the inner faces of said jaws being provided with straight grooves forming straight guideways, and a hydraulic cap having straight lugs seated in said grooves and firmly interlocked with said jawsso as to prevent the cap from turning between said jaws; the faces of said lugs opposed to the axis of the roll journal being inclined upwardly from the sides of said hydraulic cap, and the walls of said grooves opposing the inclined faces of said lugs being inclined to correspond to the inclined faces of the lugs.

J. F. ONEIL.

In the presence 0f-- A. J. MC'CAULEY, E. B. LINN. 

